#plot \
#   "test.dat" u 1:2 lt 1 lw 3 ,\
#   "test.dat" u 1:4 lt 2 lw 3 ,\
#   "test.dat" u 1:7 lt 3 lw 3
   
set multiplot
   
set size 0.5,1
set origin 0.0,0.0
plot \
   "test.dat" u (1-$1):2 lt 1 lw 1 ,\
   "test.dat" u (1-$1):3 lt 2 lw 1 ,\
   "test.dat" u (1-$1):4 lt 3 lw 1 ,\
   "test.dat" u (1-$1):5 lt 4 lw 1 ,\
   "test.dat" u (1-$1):6 lt 5 lw 1 ,\
   "test.dat" u (1-$1):8 lt 6 lw 1 ,\
   "test.dat" u (1-$1):9 lt 7 lw 1 
   
set size 0.5,1
set origin 0.5,0.0
plot \
   "test.dat" u 1:11 lt 1 lw 1
 
set nomultiplot